A number line extends from #-oo# on the extreme left to #oo# on the extreme right. Zero will be in the center. Just one unit to the right of zero is #1# and #-1# one unit to the left of zero.
#3/4# lies between #0# on the left and #1# on the right. Divide this portion in four equal parts. #3/4# will be one part to the left of #1#.